ocr: Hov to modify your. Bell Touch Tone Fone to have 1633 cycle toné by The Magician In issue 62 of TAP, I gave you information on the use of 1633 cycle tones for setting up toll free loop-arounds, mass conferencing, and becoaing with Autovon. the information operator as vell as applications is very TAP Now I vill describe hov to modify a standard Bell Touch Tone fone to have the extra four 1633 buttons. An excellent article on this subject appeared in the April, 1975 issue of the DOW defunct "TEL" magazine. The modification simple and requires only a SPDT toggle switch (I recommend a miniature ty ...
